A systems administrator is working on a solution with the following requirements:

Provide a secure zone.

Enforce a company$-$wide access control policy.

Reduce the scope of threats.

Which of the following is the systems administrator setting up$?$

A$.$ Zero Trust

B$.$ AAA

C$.$ Non$-$repudiation

D$.$ CIA

can you explain how zero trust is answer? AAA might be answer as authentication will ensure not unauthorized access which will create secure zone, authorization will give access to only needed resources which will ensure $2$nd option.